Malicious PDF — malware analysis report

Static analysis result for SHA-256 5578c3a90d782a71…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 05:10:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ffd936899e52ac560387c7c41c952919 SHA-1: 37eee853644e40d89a0ac1cfd3948a5bfcd8ed36 SHA-256: 5578c3a90d782a71307639d4c499b1e910ca98bff85bc6e36e700d7d50f3883e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/free-coins-and-spins-coin-master-game-hack PDF link annotation
    • https://library.pqm.co.id/repository/roblox-how-to-get-free-stuff-from-catolog_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-account-2021-roblox_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/roblox-hack-more-robux_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/robux-hack-no-download-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/how-to-find-free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/roblox-free-dominus-2021_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/old-roblox-account-free_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/how-to-make-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-characters-without-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-script-injector-for-roblox-v3rm_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/how-to-hack-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/how-to-get-free-robux-208-legit_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-mac-exploit-for-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003167.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3167 22928 bytes
SHA-256: 2f60dfd0a851d8f6b15c1f288714caba75645f45a2e63b0e2b1129d7bdaf525c
font_01_sfnt_off000064e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E5 18348 bytes
SHA-256: c90f632020bcb1e728f62a43997badda2860e0d329262e99dedc1f8a12c39115

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